Usually key value pairs are handled something like this:

h = {}
h[:boy] = 'John'
h[:girl] = 'Mary'
h[:boy]  # => 'John'
h[:girl] # => 'Mary'

Using OrderedOptions, the above code could be reduced to:

h = ActiveSupport::OrderedOptions.new
h.boy = 'John'
h.girl = 'Mary'
h.boy  # => 'John'
h.girl # => 'Mary'
Methods
#
M
R
Instance Public methods
[](key)
Also aliased as: _get

Source: show | on GitHub 

# File activesupport/lib/active_support/ordered_options.rb, line 25
def [](key)
  super(key.to_sym)
end
[]=(key, value)

Source: show | on GitHub 

# File activesupport/lib/active_support/ordered_options.rb, line 21
def []=(key, value)
  super(key.to_sym, value)
end
_get(key)
Alias for: []
method_missing(name, *args)

Source: show | on GitHub 

# File activesupport/lib/active_support/ordered_options.rb, line 29
def method_missing(name, *args)
  name_string = name.to_s
  if name_string.chomp!('=')
    self[name_string] = args.first
  else
    self[name]
  end
end
respond_to_missing?(name, include_private)

Source: show | on GitHub 

# File activesupport/lib/active_support/ordered_options.rb, line 38
def respond_to_missing?(name, include_private)
  true
end